📎 AI Summary:
The thread discusses Marianna's struggle to revert her Lenovo laptop from the Windows Technical Preview back to Windows 8.1 after experiencing bugs and installation issues. Despite multiple attempts using different methods (USB, changing boot order, clean installs), her installation always fails at 93%, with a failure message and no error code. Respondents suggest performing a clean install via bootable media, verifying the boot process, and considering the use of a disk or system recovery options; they also inquire about her installation process and system specifics to offer more targeted advice. Overall, the sentiment indicates troubleshooting challenges with reinstalling Windows 8.1 following a failed upgrade or preview installation.
Marianna

Marianna

New Member
Joined
Dec 12, 2014
Messages
8
Thread Author #1
Hello there.

I bought my laptop with Windows 8 pre-installed and when the 8.1 was out, I successfully upgraded to it. Then I read about the Windows Technical Preview, I installed it and saw that it is a very very buggy version, so I tried to return back to Windows 8.1. I have attempted to install it through USB, or hard drive partitions making them both bootable etc., but it always stucks at 93%. I run it as administrator, change the compatibility settings, remove any external devices, try everything but still the same issue. What can I do? I even tried 2 different iso files for Windows 8.1 Pro x64, all to no avail. Still the same problem. Please help me out as to what to do to successfully resolve this. I have searched for this issue and tried most of the advice that was given, but nothing worked for me.

Thank you.
 

Solution
Marianna
Hello guys and thank you for your suggestions.

I went into my BIOS and changed some settings, such as "Disable secure boot" and something about UEFI and Legacy thing (it was set to only UEFI and I selected both UEFI and Legacy). After that, it enabled to boot from the USB with the windows 8.1 installation so I performed a clean install of it (had to re-download all of my applications and thankfully I have an external HDD of 1 TB, so all of my personal documents were not lost). Lenovo for some reason does not allow to boot from USB even if you change the priority thing, so I had to perform these tasks first in the BIOS settings.

Windows 8.1 Pro yayyyyyyy:

http://i.imgur.com/HIuJB6I.png

To answer some of your questions, my...
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K

KSR

New Member
Joined
Oct 2, 2016
Messages
3
#21
hey if i open the setup the following says like this:

Windows cannot open the required file G:\sources\install.wim. The file may be corrupt or missing. Make sure all files required for installation are available, and restart the installation. Error code: 0x80070570
 

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K

KSR

New Member
Joined
Oct 2, 2016
Messages
3
#22
I am getting a problem like this :-
An image from 'Windows 8.1 Installation Failed at 93%'. Windows Setup error shows missing or corrupt install.wim file halting installation restart.
 

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